.var.name

[character(1)]
Name of the checked object to print in assertions. Defaults to
the heuristic implemented in vname.

add

info

[character(1)]
Extra information to be included in the message for the testthat reporter.
See expect_that.

label

[character(1)]
Name of the checked object to print in messages. Defaults to
the heuristic implemented in vname.

Value

Depending on the function prefix:
If the check is successful, the functions
assertEnvironment/assert_environment return
x invisibly, whereas
checkEnvironment/check_environment and
testEnvironment/test_environment return
TRUE.
If the check is not successful,
assertEnvironment/assert_environment
throws an error message,
testEnvironment/test_environment
returns FALSE,
and checkEnvironment returns a string with the error message.
The function expect_environment always returns an
expectation.